采用高精度、高稳定性的低电阻仪对23CO14NI12CR3钢热滞回线及回火过程进行了实时、动态测量,分析了升温期间热滞回线出现平台现象的原因,对诸如回火温度、时间等影响马氏体转变的本质及规律作了系统研究.由电阻法及X射线衍射法所得关于碳化物及马氏体转变的结果是一致的,进一步讨论了逆转变奥氏体的稳定性问题.通过透射电镜观测了逆转变奥氏体及碳化物的形貌、分布及含量等.“,”In measuring very precisely the heatstagnation curve (electrical resistance vs temperature) for 23Co14Ni12Cr3 steel, we found abnormal terrace phenomenon during heating. We present now our explanation of the terrace phenomenon. Through TEM (transmission electron microscopy) observation, we found that, for the part of heatstagnation curve where electrical resistance remained nearly constant, cementite increased and would increase the electrical resistance but the carbon needed in forming the cementite must ...